Across eight Freddie Mac multifamily securitisations priced in early 2026, underwriting has tightened decisively, according to CRED iQ data. The weighted average debt service coverage ratio (DSCR) for the Freddie Mac K-Series channel stands at 1.41x with a loan-to-value (LTV) of 63.9 percent, with approximately 95 percent of the volume featuring full or partial interest-only (IO) structures.
CRED iQ analysed the loan-specific annexes behind FREMF 2026-K179, K180, K561, K562, K563, K766, the floating-rate KF172 and the small-balance Q040, representing 472 loans and over USD 7.2 billion in outstanding principal. The emerging picture is one of a market that has re-evaluated risk without abandoning leverage. It is betting on interest-only periods to keep coverage afloat while the interest rate curve remains elevated.
Coverage is primarily generated by structure rather than cash flow. Fixed-rate K-Deals closed with weighted DSCRs between 1.35x and 1.51x, but these figures rely heavily on interest-only periods. Full interest-only (IO) terms accounted for about 30 percent of the total K-Series volume, with partial interest-only making up another 65 percent, meaning that principal payments are the exception rather than the rule. If the IO benefit were eliminated, several loans on a fully amortising basis would be at or below 1.2x.
Leverage has been maintained; pricing has adjusted. Weighted LTVs were concentrated in the low-to-mid 60-percent range in the fixed-rate segment, consistent with historical Freddie Mac discipline. What did move was the coupon: gross interest rates ranged from approximately 4.9 percent on the cleanest refinancings to 5.66 percent in the floating-rate KF172 pool. Acquisitions accounted for about 40 percent of the K-Series volume, a positive sign that transaction volume is returning, even if borrowers face higher costs.
The floating-rate pool is where stress is concentrated. KF172 was underwritten with a weighted DSCR of 1.21x and an LTV of 68.7 percent, the thinnest and most highly leveraged of the group, with each loan featuring SOFR-based pricing and mandatory interest rate caps. This is the segment to watch: coverage that appears adequate on an IO basis shrinks rapidly if SOFR remains stubbornly high in refinancing windows.
For the second half of 2026, the reliance on interest-only periods is expected to peak and then decline. Lenders cannot sustain coverage through IO structures alone. As the curve normalises, amortising structures are expected to re-enter K-Deals, and full interest-only terms are projected to fall below a quarter of the volume by year-end. The floating-rate segment will define the next cycle of distress, if there is one.
CRED iQ's assessment states that the credit quality of the fixed-rate K-Series is solid, but pools like KF172 concentrate refinancing and cap expiry risk. Loans with amortising coverage ratios below 1.25x in Florida and the “garden” property segment in the Midwest should be monitored, as deterioration will first appear there in 2026. Acquisition volume continues to rise, and the share of acquisitions in new K-Series issuances is expected to exceed 50 percent by Q4 2026 for the first time since the interest rate shock, indicating that multifamily pricing is finally aligning with the cost of capital.
